Neal First, emeritus professor at the University of Wisconsin-Madison and the man whose research on cattle reproduction led to the cloning of cattle, died on November 20 from complications with cancer. First was 84 years old.

First studied animal physiology at the university for 45 years and taught various classes related to animal health. His reproduction research, specifically egg and sperm maturation, in the 1980s led to in vitro fertilization of cattle, David Tenenbaum reported for the University of Madison-Wisconsin News.

First’s research eventually led to the cloning of cattle. The first cloned calf was named Gene and was born at ABS Global Inc. in 1997.

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